People look at the pyramid of Chichen Itza in the southern Mexican state of Yucatan

People look at the pyramid of Chichen Itza in the southern Mexican state of Yucatan March 21, 2012. Hundreds of Mexicans and tourists gathered at Chichen Itza to welcome spring at the Mayan pyramid El Castillo (The Castle), a temple to Kukulkan, the feathered serpent and Mayan snake deity. REUTERS/Victor Ruiz Garcia (MEXICO - Tags: SOCIETY)